12G
EXPOSITION AT VIENNA.
Takle showing the Pressure different BricJcs are capable of sustaining
in various positions.
Degree
of Burning.
Salmon,
Salmon, .
Salmon, .
Light
Stretcher,
Hard, .
Salmon, j
Light
Stretcher,
Hard,
Locality of
Clay.
Pea Shore,
N. J.
Philada.
Neck.
Process of
Manufacture.
C.B. & Co.
Machine.
By hand,
Position—
pressure.
The material
between which
the brieks
were placed.
' End.
Edge.
Side.
Edge.
Side.
Edge.
Side.
Side.
Number of pounds
pressure at which the
brieks crushed.
Ash wood.
Cast iron.
8,960= 4 tons.
15,680= 7 tons.
40,320=18 tons.
13,440= 6 tons.
134,400=60 tons,
without crushing.
11,200= 5 tons.
33,600=15 tons.
67,200=30 tons.
The first four experiments were made with the brieks laid
between hard ash planks, but the wood crushed and spread
out, carrying the edges of the brieks with it, so that the pressure
at which they crushed may be considered far under the
actual pressure the brieks are capable of sustaining. The
last four experiments were made with the brieks between
plates of cast-iron, without any cement, or anything between
them, the rough, uneven surfaces comiug in contact; consequently,
they were much more severe than though the brieks
had been laid in cement, so as to allow the pressure to be
evenly distributed over the whole surface.
Display of Brick Machines at Former Exhip.ttions.
At the Exhibition in Paris, 1867, several brick machines
were shown, and were reported upon specially by M. Paul
Bonueaville, Engineer of Arts and Manufactures, with drawings.*
The London International Exhibition in 1871 was particularly
rieh in all forrns of the potter’s art and appliances, and
the brick and tile machinery of Europe was well shown. It
is described in some detail by Peter Bawden, Esq.,| and also
by Arthur Beckwith of New York. Salvetat and Ebelmen,
* Etudes snr L’Exposition, Lacroix, VII., 350.
t Official Reports (British) on the London International Exhibition, I., 345.
